Teaching pronunciation class to a mixed group of learners can ________ a teacher with many challenging problems.
#11050
A
provide
B
produce
C
present
D
offer
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 —We want to finish the task ahead of time.—You have to _____________, if so.
#12457
A
speed it up
B
take it up
C
pick it up
D
turn it up
The enlarged school campus is       the old one.
#14512
A
as three times big as
B
three times as big as
C
big three times than
D
as big as three times